Llwyn-onn Water Treatment Works Llwyn Onn Merthyr Tydfil CF48 2HS

Upgrade of Llwyn-onn Water Treatment Works, including new buildings, underground pipelines and other associated infrastructure; demolition of redundant buildings; engineering works; landscaping and other minor works across the Llwyn-onn Water Treatement Works and Cantref Water Treatment Works area.

Status: Waiting for a decision
Reference: 26/25010/FUL
Type: Full planning permission
Size: Large
Received: 30 October 2026
Decision due by: 5 December 2026

Have your say

This application is waiting for a decision, so you can still comment. Say whether you support or object, and why, sticking to planning matters. Comments go to the council and are usually published.

Only planning matters count in a decision: things like the look of a building, traffic, noise, overlooking, loss of light, and the council's local development plan. A fall in the value of a neighbouring home doesn't count, nor does who the applicant is.

Comment on the council's website

Where it has got to

Application received
Done
The council checks the application is complete and gives it a reference number.
Consultation
Now
The council tells neighbours and others, usually with a site notice or letters. Anyone can comment, usually within 21 days.
Decision
To come
Most applications are decided by the council's planning officers. Larger or disputed ones go to the planning committee, where councillors decide in public.
After the decision
To come
If permission is refused, the applicant can appeal to Planning and Environment Decisions Wales. Other people can't appeal, but can comment on an appeal.

Collected by UK PlanIt from Bannau Brycheiniog National Park's planning register, which is the official record. Plans and drawings are on the council's website.